Home / 18,711.40-28,072.20-7,615.60

Finding the Fourth Proportional to 18,711.40, 28,072.20 and 7,615.60

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Solution

The fourth proportional to 18,711.40, 28,072.20 and 7,615.60 is: 11,425.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.40 : 28,072.20 = 7,615.60 : x
  2. Step 2: Convert to fraction form
    18,711.40/28,072.20 = 7,615.60/x
  3. Step 3: Cross multiply
    18,711.40x = 28,072.20 × 7,615.60
  4. Step 4: Simplify right side
    18,711.40x = 213,786,646.32
  5. Step 5: Solve for x
    x = 213,786,646.32/18,711.40
  6. Step 6: Final answer
    x = 11,425.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.